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package org.junit.runners.model;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.lang.reflect.WildcardType;
import java.util.List;
class NoGenericTypeParametersValidator {
private final Method fMethod;
NoGenericTypeParametersValidator(Method method) {
this.fMethod = method;
}
void validate(List<Throwable> errors) {
for (Type each : fMethod.getGenericParameterTypes())
validateNoTypeParameterOnType(each, errors);
}
private void validateNoTypeParameterOnType(Type type, List<Throwable> errors) {
if (type instanceof TypeVariable<?>) {
errors.add(new Exception("Method " + fMethod.getName()
+ "() contains unresolved type variable " + type));
} else if (type instanceof ParameterizedType)
validateNoTypeParameterOnParameterizedType((ParameterizedType) type, errors);
else if (type instanceof WildcardType)
validateNoTypeParameterOnWildcardType((WildcardType) type, errors);
else if (type instanceof GenericArrayType)
validateNoTypeParameterOnGenericArrayType((GenericArrayType) type, errors);
}
private void validateNoTypeParameterOnParameterizedType(ParameterizedType parameterized,
List<Throwable> errors) {
for (Type each : parameterized.getActualTypeArguments())
validateNoTypeParameterOnType(each, errors);
}
private void validateNoTypeParameterOnWildcardType(WildcardType wildcard,
List<Throwable> errors) {
for (Type each : wildcard.getUpperBounds())
validateNoTypeParameterOnType(each, errors);
for (Type each : wildcard.getLowerBounds())
validateNoTypeParameterOnType(each, errors);
}
private void validateNoTypeParameterOnGenericArrayType(
GenericArrayType arrayType, List<Throwable> errors) {
validateNoTypeParameterOnType(arrayType.getGenericComponentType(), errors);
}
}
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